Orshansky Poverty Thresholds

The "Orshansky Poverty Thresholds" form the basis for the current measure of poverty in the U.S. Mollie Orshansky was an economist working for the Social Security Administration (SSA). Her work appeared at an opportune moment. Orshansky's article was published later in the same year that Johnson declared war on poverty. Since her measure was absolute (i.e., did not depend on other events), it made it possible to objectively answer whether the U.S. government was "winning" this war. The newly formed United States Office of Economic Opportunity adopted the lower of the Orshansky poverty thresholds for statistical, planning, and budgetary purposes in May 1965.


The Bureau of the Budget (now the Office of Management and Budget) adopted Orshansky's definition for statistical use in all Executive departments in 1965. The measure gave a range of income cutoffs, or thresholds, adjusted for factors such as family size, sex of the family head, number of children under 18 years old, and farm or non-farm residence. The economy food plan (the least costly of four nutritionally adequate food plans designed by the Department of Agriculture) was at the core of this definition of poverty.


The Department of Agriculture found that families of three or more persons spent about one third of their after-tax income on food. For these families, poverty thresholds were set at three times the cost of the economy food plan. Different procedures were used for calculating poverty thresholds for two-person households and persons living alone. Annual updates of the SSA poverty thresholds were based on price changes in the economy food plan.